Really... I didn't know about that.
@Prof. Curiosa does you wrote about this inaccuracy to Gog team? Maybe they will add cloud save feature to game's page after that :)

So, I decided to add request to Gog team, that they need to add Cloud Saves feature to main page of Halfway. Now need to wait for their reaction...

So, less than a day and Cloud Saves feature now on game page. This time GoG done well! Thanks to Cypers for quick response!

P.S. If you want to change something don't be shy to write to GoG support...

Good job and thanks @LifeLover :))), now, we - gamers have complete info about game on game page.

I visited the Steam page dedicated to the game and found out that the Steam version - has achievements support, gog version - does not. That is another one example of why Steam has more sold copies of almost all games that are available in both stores. In most cases, the Steam version of any game has many more features available in comparison to the Gog version of the game (Cloud Saves, Achievements, Multiplayer function, Controller Support, Leaderboards, Official MODs support, etc).